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Thanks  :thumbs: I have everything ready and waiting - just need to finish up some other work before I start making sawdust... Kind regards, Ian.

Sorry you are having trouble finding someone to do this for you. You could have some sheets of thin plywood sawn lengthwise down the middle which will give you pieces 60mm wide x 2.4m tall, then screw down a full length piano hinge and finally just stain / paint them to look good. It would...

Good morning Meneer! This sounds like an exceptionally messy and unpleasant job to me. When I see the word pitch I think about the way soldiers defended walls back in the 11th century by pouring boiling pitch onto the attacking forces down below. Unpleasant  :flame: I reckon Rick's advice is a...

This is one of the current gain stage boards (click for a larger image): It is one of 2 which will make up a single channel of amplification.  There are 16 pairs of output transistors (32 total) which combined will have a theoretical power delivery capability of 4.8kW.  That's just theory...

I have tried many different cables over the years, and I find that I always somehow come back to plain old copper.  The other things seem to sound great initially, but somehow over the long run it leaves me not liking it and I switch back. What I find much more fascinating is how the guage of...

That seems like a serious amount of work to do with a router!  Don't you know someone with a table saw?  Make 3 or 4 cuts at different angles which will get you 90% of the way there, then you just finish up by sanding. Kind regards, Ian.

These fancy classes are all good, but somehow leaves me feeling a bit blaaaah when it comes to listening to actual music.  Sure, from a tree hugging, oil saving, green-peace point of view it's the way to go... My brain is somehow stuck in the 70s - I drive a 6.0 liter push rod V8 (daily driver)...

Thanks for the suggestions, I like  :dop: I must be honest - I am yet to measure a driver in a cab which looks much like those manufacturers graphs, so I don't pay too much attention to them  :sulky: What I rather do is look at the specs in detail and choose based on them. Any funny business...

Hi R, Yip, there will be a price to be paid for the sides poking past, but I don't know just how "expensive" that will be.  It's not poking past much so hopefully not too much of an issue, though only the microphone will be able to tell me the truth about it... The plinth has been a bit of a...

Hi Gavin, I have done all those things in other builds.  It's interesting and there are certainly benefits.  Remember that anything you do in speaker design is a trade-off.  There are never any clear outright wins, so the question becomes what the actual benefit is vs what the price is you...

Some of you may know that I like to build something a little different each time - what's the point of doing the same 2 way over and over again using different drivers?  Square box, little bigger, little smaller, drivers this configuration or that, port tuning higher or lower - it's boring. ...

Hi Pierre, Thanks for taking the time to share your thoughts  :dop: You do make a number of interesting observations.  To be fair, we don't normally need this kind of power in the home environment.  As with many hifi related things overkill and insanity prevails at times, so it's more of a...

Yip, that's why it really doesn't make sense to "upgrade" from something like an 80W amplifier to a 100W amplifier if you need more SPL. To get double the loudness we typically need between 9 and 10 dB.  Therefore twice as loud = between 8 and 10x the power.  It's a downward spiral...

I have been busy working on something to supersede the SM-150 power amplifier for a number of months now, and things get interesting quickly. The basic topology will remain symmetric complementary differential (same as the SM-150), but implemented a bit differently and optimized in other ways. ...

To me the biggest difference is in the the way the rear wave can be damped and the way a TL doesn't build as much pressure as a bass reflex cabinet. My all time favorite type of speaker is still a tapered quarter wave tube (TQWT) which works on a similar principle as a TL, but with less...

I don't think you will be able to do this very easily. The analogue parts aren't normally too bad, but the digital can be tricky. USB communications normally go through a dedicated comms chip, which is sometimes internal to a microprocessor which in turn will do all kinds of others tasks like...

Many of the older cabinets I have worked on has Shellac on it for a finish. What's nice about that is new shellac will soften and blend with old shellac, so where you have a surface finish problem, you can sand it gently then reapply shellac and blend it in with the surrounding area. As for...

Just for completeness, and seeing how this is being aired live anyway, the situation with your friend is as follows: - I have a list of emails and WhatsApp messages which must by now number in the 100s between the customer and myself. - there have been numerous phone calls. - We met up whilst I...

Hi Guys, It's been a long time since my last visit here - I see I have an inbox full of PMs as well.  Will get to them during the next couple of days  ;) Sorry if anyone is feeling unhappy - it's not my intention to have people stressed out. @Seas - I will send you the new set of boards on...

Most likely brushed and anodized, but we will cross that bridge when we get there.  For now I need to figure out how to make the rest of the case  ;) Kind regards, Ian.